Carbureter-receptacle and mechanism for making same.



F. L. KINGSTON.

CARBURETER RECEPTACLE AND' MECHANISM FOR MAKING SAME. APPLICATION manJUNE 6. 1913.

1 191,19O. Patented July 18, 1-916.

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F. L. KINGSTON.

CARBURETER RECEPTACLE AND MECHANISM FOR MAKING SAME.

APPLICAHON men JUNE 6. 191a.

Patented July 18, 1916.

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F. L. KINGSTON. 1 CARBURE-TER REGEPTACLE AND MECHANISM ron MAKING SAME.

APPLICATION FILED JUNE 6. 1913.

1,1 91,1 90. Patented July 18, 1916.

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CARBURETEK RECEPTACLE AND MECHANISM FOR M AAAAAAAA E.

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FRANK L. KINGSTON, OF CLEVELAND, OHIO.

CARIBUIRETER-REOEPTACLE AND MECHANISM FOR MAKING Continuation ofapplication Serial No. 695,425, filed. May 6, 1912.

- Serial No. 772,121.

T 0 all whom it may concern:

Be it known that I, FRANK L. KINGSTON,

a citizen of the United States, residing at- Cleveland, in the county ofCuyahoga and State of Ohio, have invented a certain new and usefulImprovement in Garbureter-Receptacles and Mechanism for Making Same, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings.

This invention relates to carburetors and has for its main object thesimplification of the construction and the cheapening of the cost ofmanufacture of such devices.

More particularly the objects of the invention may be stated as: theprovision of a v device of this nature wherein the parts aremanufactured so far as possible of metal which 1s stamped or drawn intoshape 1nstead of being cast, thus avoiding the moss sity of tedious andexpensive lathe work;- the provision of a fluid receptacle or reser-;voir for this type of devices of great lightness and absolute proofagainst leakage; the

provision of a carbureter having a fuel reservoir of annular form 1nMuch the reservoir is made of a slngle p1ece of sheet metal stamped ordrawn into shape; the provision of a new and improved mechanism forform-' ing a double walled annular vessel of the type herein specified;the provision of a new and improved inlet or float valve; while; furtherobjects and advantages of my 1nvention will become apparent in thecourse of the following descriptlon and claims.

In so far as concerns the articles herein. described and claimed, thesubject matter of this application is common to that of my; earliercopending application filed May 6,. 1912, Ser. No. 695,425, and to thatextent the present application is a continuation of the; former case;the process of forming the receptacle described herein and in my formerapplication, is now disclosed in apatent-application for the first time,

Generally speaking, my invention may be defined as consisting of thevcomblnatlons of. parts and the successive manlpulations de fined in theclaimshereto annexed and illustrated in the drawings accompanying andforming a part hereof, wherein:

Figure 1 is a vertical, central, cross-sectional view through acarbureter constructed in accordance with my invention; Fig. 2 is aperspective view of the completed reservoir Specification of LettersBatent.

Patented July 18, 1916. This application filed June 6, 1913.

ated upon; Fig. 6 is a view similar to Fig. 5. showing the position ofthe parts after the blank has been operated upon to produce the articleillustratedin Fig. 3; Fig. 7 is a perspective view of a portion of thefloat showingthe pivoting and valve operating means; Fig. 8 is aperspective View of the bracket by which the float is pivoted; and Fig.'9 is a perspective view of the clip whereby the float pivot is held inengagement with the bracket.

Reference to the drawings will show that my improved carburetercomprises an annular fuel reservoir made from a single piece of sheetmetal and having concentric cylin: drical walls connected together by anintegral bottom, the inner wall defining a carbureting chamber whereinthe fluid fuel is mixed with air, and one portion of the outer wallbeing bulged or expanded for the reception of the valve mechanismwhereby a constant level of liquid fuel is maintained in the reservoir.The inner wall of this receptacle is indicated at 1 and the outer wallat 2. The lower end of the wall 1 merges with a downwardly flaringportion 3 which in turn j merges with the upwardly flaring portion 4,

the latter portion being connected at its upper. edge with the wall 2.The height of the wall lis preferably somewhat greater than that of thewall 2 as illustrated in Fig. 1.

The wall 2 is preferably swelled or bulged outwardly at one point in itsperiphery so as to produce a hollow protuberance 5, this protuberancehaving an integral, substantially horizontal bottom 6, which is punchedwith a circular aperture for the reception of the fluid supplyconnection. This connection may conveniently consist of a threadedmember 7 traversing this aperture and having a peripheral flange 8 atits upper end, and also provided with a lock nut 9 whereby it is securedin place. This memher is formed with a longitudinal bore 10 having itsupper end flared or otherwise formed as a valve seat, and having itslower end formed for the reception of a nipple 12 adapted to be securedto the member by a gland 13. Secured in the protuberance 5 is a U-shapedbracket illustrated in perspective in Fig. 8, said bracket comprising aflat bottom plate 14 having an aperture 15 adapted to receive the bodyof the member 7 and having at each side an upright arm 16 formed at itsupper end with a vertical notch 17. The plate 14 is clamped against thebottom 6 of the protuberance by the lock nut 9, and in addition theparts 6, 7, 8, 9, and 14 are preferably sweated together with solder.sides of the arms 16-16 is preferably the same as the interior width ofthe protuber- Surrounding the inner wall 1 of the reservoir is anannular buoyant body 20 of cork or of other suitable material, said bodyhaving secured to its upper surface at one side the laterally projectingarm illustrated with particularity in Fig. 7. This arm comthe forwardend whereof is seen at 29, and

this forward end is likewise formed with a slot registering with theslot 25 and a recess registering with the recess 26. The rear ends ofthese plates are secured together by suitable means, such as rivets 30,and the whole is secured to the float by means of a staple 31 extendedthrough the body of the float as shown in Figs. 1 and 7.

The projecting ends of the plates 21 and 28 are spaced apart verticallyso as to form an attachment for the movable member of the inlet valve,said movable member com prising a stem 33 having at one end a conicalhead 34 adapted to enter the upper end of the bore 10 and havingadjacent to but spaced from the other end an integral sphericalenlargement 35. The diameter of the stem 33 is somewhat less than thatof the enlargement or recess 26 and not greater than the width of theslots 25, but the diameter of the enlargement 35 is slightly greaterthan the distance between the nose 24 and the free end of the plate 29-.This construction permits the enlargement35 to be seated in the recesses26 by thespringing apart of the plates, and be securely retained thereinwhen assembled. The parts can be so designed as to afiord the stem thefreedom of movement necessary to its proper operation.

The pivot wire 23 is held in the notches 17 -17 by means of a U-shapedretaining The distance between the outclip 38 illustrated in Fig. 9, thesides 39 39 of which are spaced apart the same distance as the arms16-16 of the bracket and are provided with tips 4040 adapted to enterthe notches 1717 and engage the wire 23. The top of the reservoir isclosed by means of a suitable cover 41 also preferably of sheet brassand conforming to the shape of said reservoir, said cover having aperipheral downturned flange 42 adapted to overlap the upper edge of thewall 2 and of the protuberance 5. The middle portion of this cover isembossed upwardly by a slight amount, as shown, so as to be engaged bythe lower face of a split ring 43 whereby it is held in place. The upperend of the wall 1 is outwardly flared as shown at 44, and the inner wallof the ring 43 is inclined complementarily thereto so that when the ringis constricted about this wall it is drawn downwardly against the top ofthe cover 41 which is thereby securely held in place. The inner surfaceof the cover is also arranged to engage the clip 38 so as to hold thesame against displacement. center of the cover is formed with an.aperture 46 of sufficient size-to pass over the flared portion of theinner wall, the face of the ring 43 forming a closure for this opening.The ring 43 is also preferably formed to engage the throttle valvecasing 45, but inasmuch as the particular nature and construction ofthis casing and the throttle valve is not a part of the presentinvention, an extended description of the same is believed to l beunnecessary.

Within the wall 1 is located the carbureting chamber, the lower end ofthis chamber being provided with suitable air-admitting and regulatingdevices and the wall of this chamber being provided with a nozzle member50 communicating with the fluid fuel reservoir hereinabove described. Tnthe present embodiment said nozzle member comprises a cylindrical tubemounted in this reservoir in an angular manner, the side of the tubebeing parallel to the bottom 3 and the outer end of the tube projectingsubstantially normally through the bottom portion 4. A suitableregulating valve 51 may be threaded into the outer end of this tube, andthe tube may have a connection with the interior of the reservoir bysuitable lateral apertures, as illustrated.

The air admitting and regulating devices are indicated generally at 52,but their specific construction and mode of operation is not a part ofthe present application, being fully described and claimed in the parentcase hereinbefore referred to. In fact the fuel reservoir disclosed andclaimed herein is not restricted to use with the particular air inletand control devices, or with the exact discharge nozzle eXpedient-sherein illustrated, and I do not desire this illustration The anddescription to limit me to this construction or arrangement, havingshown the same solely for the purpose of illustrating one suitablemethod whereby my improved fuel reservoir may practically be employed.Any suitable or convenient arrangement of carbureting chamber may beused Within the scope of my invention.

Whatever the arrangement of the operating parts of this chamber, thesame is preferably constructed as a tubular chimney member having acylindrical portion 53 fitting closely within the wall 1 and having aninclined portion 54 at its lower end adapted to be drawn against thebottom portion 3 of the receptacle. The chimney member is preferablysecured in place by having its upper end flared outwardly as at 54 so asto overlie the similarly flared portion 44 of the wall 1. Thevariousadjuncts of the carbureting chamber can be secured to thischimney in any manner desired without the necessity of perforating oroperating upon any part of the reservoir.

As before stated the reservoir of my improved carbureter is made from asingle piece of sheet metal and the mode of forming the same as well asthe article itself is a portion of the present invention. In the processof forming this reservoir the metal sheet is first subjected to pressingand drawing processes which form the blank illustrated in Fig. 4. Thisblank consists of a central hollow boss having a substantiallycylindrical wall 1" and provided at its lower end with an integraloutwardly and downwardly flared portion 3 which merges with an upwardlyand outwardly .flared portion 4 the latter terminating in a fiatlaterally extending flange 2 The flange 2 is circular excepting for anelongation 5 at one side and the central boss generally has its upperend closed by a web, as shown at 60. A description of the particularmethod of forming this blank from the original metal sheet is believedto be unnecessary to this application from the fact that the same waswithin the common knowledge of die-makers and metal-workers prior to myinvention.

Comparison of the blank shown in F ig. 4 with the completed articleillustrated in Fig. 2 will show that the wall 1* and portions ,3 and 4correspond almost exactly with the portions numbered 1, 3, and 4,.in thecompleted article, while the flange 2 operates when properly treated toform the outer wall 2, the extension 5 affording the metal necessary tothe production of the protuberance 5.

The blank shown in Fig. 4, is placed in a punch-press between dies ofthe shape shown in Figs. 5 and 6. In these views, the fixed die memberis illustrated at 61 and has an upper flat surface 62 and an un-' wardlyopening substantially cylindrical cavity 63 opening through thatsurface, the depth and diameter of the cavity being equal to that to begiven the outer Wall of the reservoir. One Wall of this cavity is alsoformed with a lateral recess 64 having the exterior shape desired to begiven to the protuberance 5.

'Rigidly mounted in the center of this cavity is a cylindrical block 65Whose external diameter is the same as the internal diameter of thefinished inner wall of the vessel. Slidably fitting in the annular spacebetween this block and the wall of the recess is a supporting ring 66,the upper face of which is shaped to conform to the portions 8 and 4 ofthe blank as clearly shown in Figs. 5 and 6. Reciprocating rods 6767 aresecured to this ring and project downwardly through suitable aperturesin the bottom of the die member 61 where they engage the sliding head68. Beneath the sliding head 68 is the fixed head 69 rigidly securedat-a fixed distance from the stationary die member, the space betweenthese heads being filledby a soft rubber block 70. In the presentembodiment, the fixed head 69 is adjustably secured by means of a nut 71to the lower end of a depending bolt'72, the upper end of which passesthrough a suitable aperture in the die member 61 and engages thecylindrical block 65. This bolt,

therefore, performs the function of securing the block 65, supportingthe head 69, and guiding the head 68 which is loosely sleeved thereon.It will be obvious, however, that other expedients could be employed forsecuring the head 69 and for guiding the head 68. Also, possibly,thatthe rubber block 70 could bereplaced by a spring or air cushion,although I have hitherto found the rubber block more satisfactory inpractice.

The movable die member is indicated at 75 and is secured to thereciprocating plunger 7 6 of the press in any suitable manner.

The exterior of the die member 75 is shaped conformably to the interiorvof the vessel, suflicient space being given between its surface andthat of the cavity 63 for the thickness of the walls. The member 75 isalso formed with a downwardly opening recess 77 adapted for thereception of the hollow boss 1 of the blank, and the depending face ofthis die member is shaped to conform to the portions 3 and 4 of theblank, as shown in Figs. 5 and 6. One side of the die member 75 isformed with a laterally projecting extension 78 alined with the recess64 and adapted to cooperate therewith in forming the protuberance 5.

Surrounding the movable die member and shaped to conform substantiallythereto while affording the necessary operating clearance, is theannular holding member 80, the same having a fiat face adapted to coop rte with the upp r face 62 of the fixed die member 61, and being securedin any suitable or convenient manner to the presser foot 81 of the punchpress.

In the formation of the receptacle, the blank illustrated in Fig. at ismounted upon the fixed die member as illustrated in Fig. 5 with theportions 3 and 4: of the blank engaging the upper face of the ring 56,the flan e portion 2 of the blank overlying the upper face of the fixeddie member, and the boss 1 in alinement with the block 65. The securingmember 80 is then depressed by the adjustment of the presser foot 81 soas to engage the flange 29 with a firm frictionacontact. Thereciprocating member 76 of the press is then caused to be depressed,carrying the die member 7 5 downwardly upon the portions of the blanktherebeneath. The coaction of the ring 66 and the end of the movable diemember 75 supports and secures the portions 3 and 4 of the blank,

preventing the deformation or tearing of the same, the downward movementof the ring 66 being opposed by the rubber block, which is compressedlongitudinally and distorted laterally as illustrated in Fig. 6. Theflange 2 is drawn downwardly into the recess 63 and caused to assume acylindrical form having been meanwhile withdrawn in large part frombeneath the member 80. A narrow irregular lip 2 is, however, left atthis point and is subsequently sheared away. In fact the shearing awayof the lip 2 is preferably accomplished with the same operation with theknocking out of the web 60 and the punching of the aperture in thebottom 6 of the protuberance 5.

The blank illustrated in Fig. 4C is usually esteemed complete for thepurposes of the operations herein described before the boss 1 has beenmade truly cylindrical. Even the boss 1 herein shown generally requiresseveral operations for its production, frequently with intermediateheat-treatment or annealing of the metal. Accordingly when it isdelivered to the press for the performance of this process, the cornersare sometimes rounded away as illustrated at 85 in Figs. 4: and 5. It isobviously possible to complete these corners simultaneously with theformation of the outer wall and thus dispense with extra operations uponthe blank itself. Also, while I have described the operation of turningup the outer wall of this receptacle as complete in a single step, I donot confine myself thereto. It is frequently found desirable, and infact 'is generally the custom, to break up the process into two steps,the die members for the two steps being exactly the same excepting thatthe corners and angles of the dies employed in the first step arerounded off and obliterated to some de ree so as to avoid any suchsudden bending of the metal therearound as would serve to tear or shearthe same. The dies for the second step have sharp and exact edges whichbring the metal exactly to the proper shape. In fact, the dies for thestep may be old dies which have been employed for the second step solong that the edges have become worn and rounded.

It will be obvious that the process herein described may be employed forthe production of other articles than the specific carbureter reservoirherein described. It is not believed that said carbureter reservoir can,in the present state of the art, be made in any other manner than thathere disclosed; although if the progress of invention should discloseother modes of making the same, I esteem that the claims hereincontained will still protect said reservoir as an article of manufactureirrespective of its mode of manufacture. I am aware that changes inpoint of detail may be made in this reservoir andin the valveaccompanying the same, and such changes and modifications I esteemwithin the scope of my invention so far as they avoid the prior art. Myexperience indicates that the permissible variations from the hereindisclosed process of making the ame are very slight, but such variationsas shall hereafter be discovered I esteem within the scope of my presentclaims so far as the prior art is avoided.

Having thus described my invention, what I claim is:

1. An annular vessel drawn from a single piece of sheet metal, saidvessel having an inner cylindrical wall, an outer cylindrical wallsubstantially concentric with said first wall, and an integral bottomconnecting said walls, said bottom having flared or frustoconicalportions angularly related to each other.

2. An annular vessel of drawn metal, said vessel having an innercylindrical wall, an outer wall substantially concentric with said firstwall, and an integral bottom connect in said walls, said outer wallhaving at one side a hollow protuberance integral there with for thereception of a float valve.

3. An annular vessel formed from a single piece of drawn metal withoutseams. said vessel having an inner cylindrical wall, an outercylindrical wall, and an integral bottom connecting said walls, saidouter wall having at one side a hollow laterally projecting protuberanceintegral therewith, the bottom of said protuberance being flat andapertured.

4. A vessel formed from a single piece of sheet metal, the centralportion of the sheet being drawn upwardly to provide an innercylindrical wall and the marginal portions being drawn upwardly toprovide an outer cylindrical wall, the inner wall being higher than theouter wall and formed for the attachment of cover securing means.

5. A. vessel formed from a single piece of sheet metal, the centralportion of the sheet being drawn upwardly to provide an innercylindrical wall and the marginal portions being drawn upwardly toprovide an outer cylindrical wall, the upper end of the inner wall beingflared for the reception of a clamping ring whereby the cover is held inplace.

6. A vessel formed from a single piece of sheet metal, the centralportion of the sheet being drawn upwardly to provide an innercylindrical wall and the marginal portions being drawn upwardly toprovide an outer cylindrical wall, and a portion of the outer wall beingbulged outwardly to form a hollow protuberance.

7. A vessel formed from a single piece of sheet metal, the centralportion of said sheet being drawn upwardly to provide an innercylindrical wall and the marginal portions being drawn upwardly toprovide an outer cylindrical wall, and the portion connecting said wallsbeing bent first downwardly and then upwardly to form frusto-conicalattaching portions.

8. Mechanism for forming an annular metallic vessel having spacedcylindrical walls and an integral bottom, said mecha nism comprising thecombination, with a fixed die member having therein a recesscorresponding in shape and size to the outer wall of said vessel, of amovable die member corresponding in shape to the interior of saidvessel, a supporting ring mounted in said recess and adapted to engagethe portion of the blank between the inner and outer walls which is tobecome the vessel bottom, means for supporting the interior wall of thevessel during the operation of. the dies, means for clamping the edgesof the blank, and means for yieldingly opposing the advance of saidsupporting ring.

9. Mechanism for acting upon a ductile metal blank having a centralcylindrical boss and a laterally extending portion integral therewith,so as to form an annular vessel having spaced cylindrical wallsconnected by an integral bottom, said mechanism comprising a die memberhaving a recess adapted to receive said boss and an end adapted toengage the region of said laterally extending portion adjacent to saidboss, the sides of said die member being of a shape and size conformingto the interior of the vessel to be made, a second die member having acavity therein conforming in shape and size to the exterior of saidvessel, said second die member having a flat face, a fixed block in saidcavity and adapted to project into the interior of said boss, an annularclamping member adapted to secure against the face of said second diemember the marginal portion of said blank, a supporting ring in saidcavity and surrounding said block, means for holding said supportingring against said blank with a yielding pressure, and means for movingone of said die members relatively to the other die member so as to drawthe marginal portion of said blank into said cavity.

10. Mechanism for acting upon a ductile metal blank having a centralcylindrical boss and a laterally extending portion integral therewith,so as to form an annular vessel having spaced cylindrical wallsconnected by an integral bottom, said mechanism comprising a depressibledie member having a downwardly facing recess adapted to receive saidboss and an outer wall conforming to the interior shape and size of theouter wall of the finished vessel, the lower end of said depressible diemember conforming to the shape of the blank, a fixed die member havingafiat upper face and an upwardly opening cavity therein conforming inshape and size to the exterior of the completed vessel, an annularclamping member surrounding said cavity and adapted to clamp themarginal portion of said blank against said face, a fixed block in saidcavity and adapted to project into said boss, a supporting ring in saidcavity and surrounding said block and shaped complementarily to thelowermost end of said depressible die member, reciprocable rods securedto said ring and depending through said fixed die member, a fixed headerspaced beneath said die member, a soft rubber block on said'fixed head,a slidable head on said block and engaging the lower ends of said rods,and means for depressingsaid first die member into said cavity againstsaid ring.

In testimony whereof, I hereunto affix my signature in the presence oftwo witnesses.

FRANK L. KINGSTON.

Witnesses:

BRENNAN B. Wnsr, JOHN B. HULL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

